My Journey uses a Data Extension that I've built using a query activity, this Data Extension is expected to populated a column mid way through the journey duration.
I would like to know how I can access that column? The Journey data is data captured at the time of the entry. I know if I link the Data Extension (via Contact Builder) I can access records using Contact Data, but the behavior isn't clear if there is more than one instance of the Subscriber. How will it know which one to choose?